They already have this, but it's a bit hidden.

They're replacing the @ with +, which really ties the whole service together quite nicely (while integrating +1's as well).

Your example would use +ProductFoo, for example. If you are writing a G+ post, if you type +, it will prompt for suggestions, much like Facebook does with @.

I'm surprised it's not highlighted by Google, but they do mention it, buried in the help (which is very nicely laid out, if not hidden).

http://www.google.com/support/profiles/bin/static.py?page=gu...